Columbine High School

Peter Langman, an Allentown psychologist, author and creator of schoolshooters.info, an online collection of documents related to school shooters, is an expert on the psychological causes of school shootings and has educated teachers, law enforcement officials and mental health workers on the topic. His latest book "School Shooters: Understanding High School, College, and Adult Perpetrators" is based on his research of 48 national and international cases. He is the subject of this week's Q&A. Q: Is there a common psychological thread among school shooters? A: School shooters generally fall into one of three psychological types: psychopathic, psychotic, or traumatized....

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Peter Langman, an Allentown psychologist, author and creator of schoolshooters.info, an online collection of documents related to school shooters, is an expert on the psychological causes of school shootings and has educated teachers, law enforcement...

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